First and foremost, thank you to Mr. Alfonso for the great work, and to all the supporters.
I upgraded to 4.1 hours ago, and now I can not access my calendar. I can open the app, however there are no appointments listed. In settings I can not select calendars to sync, as none appear. In my main settings I do show my account as having calendar sync turned on. I am getting emails from that account as normal (showing me I am logged in and sync works). Any suggestions?